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Showing results for tags 'governor'.
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Our boat in France has an ancient (1950s/1960s) Mercedes OM312 engine. We recently went out to the boat for the first time in 18 months (due to Covid etc.). Much to our surprise while it was dirty outside and needed a thorough clean it was mostly OK. In particular the solar panels have kept both Leisure and Starter batteries in good condition. The engine even started fairly easily but immediately tried to rev itself to pieces so I had to close it down immediately. I tried a few more times but it did just the same. So, presumably, the governor has got stuck. Does anyone here know if likely failure modes? I'm pretty sure it's a centrifugal governor and I do have a manual for the engine but if I can go back with a few pointers it would be helpful.
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I’m on a mission to reduce my J2’s various diesel drips. There are several culprits, but the governor is the main one. I initially assumed that the governor case was leaking, as there is usually a pool of diesel where the governor flange mates with the engine, which then drains down onto the adjacent engine bearer. However, at some time past, my J2 has had a small open topped fuel reservoir added to the top of the front plate of the governor - presumably connecting to the small vent hole. This is to enable the governor to be topped up without removing the filler plug. This is in addition to the injector drain manifold feeding into the governor. The cranked rack enters the reservoir above an overflow drain, which is above the top of the governor. The only visible attachment points of the reservoir to the governor are 2 studs through the lower part of the reservoir. Using fluorescent dye and a UV torch, it appears that diesel is weeping from the interface between the reservoir and the front plate of the governor and perhaps also from its two attachment studs. I’d like to cure the reservoir leak to see if that is the root cause, rather than the governor case itself. I’ve included some photos - I’m a bit concerned by the involvement of the injector slide as I’ve not found much info on the normal arrangement or how it connects to the governor in my case. Before I attempt to separate the reservoir, I’d be very grateful for any thoughts and advice on how best to proceed. My engineering “prowess” is solely down to what I have gleaned from the kind folks of this hallowed place, so please keep it simple Thanks guys! Clive.